Railway signaling apparatus



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Nov'.'3 rl93l. J. H. BUTRIDGE 1,830,190

' RAILWAY siGNALING APPARATUS gla I M12 ATTORNEY.

Nov. 3, 1931. I L VH, BUTRlDGE 1,830,190

RAILWAY S IGNALING APPARATUS Filed May 5, 1931 4 Sheets-Sheet 2 "51 l 1 f Q0 v 160 E n e/ N N j l f 1 QQ Q D LW l\ .L 5cm .gp v m @UVV E511 INVENTOR. k' UTH-BU'tV/lf/7e,

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J H BUTRIDGE RAILWAY SIGNALING APPARATUS Filed May 5, 1931 Nov. 3, 1931.

. Nov.'` 931.

J. H. BUTRIDGE RAILWAY SIGNALING 'APPARATUS Filed May 5, 1931 4 Sheets-Sheet 4 Patented Nov.y 3, `19321k y l j;terrenal-Ares rmi-3Nrv v'elfi-iCE" j aaiuns H. BUTRIDGE, or CHICAGO, ILLINOIS, Asseriaony 'ro THE UNION sWI'rcII a SIGNAL COMPANY, 0F SWISSVALE, PENNSYLVANIA, A CORPORA'lONl 0F PENN- sYLvANIA Appncanoa met nay S', '1931,' serial No., 535,115.

My invention rela-tes yto railway signaling apparatus, and part-icularlyto apparatus for the signaling'ofstretchesot single track overA which traiiic moves in both directions. f l

l Will describe one form` ofi-"apparatus ein- .,bodying my inventiomiand will then point outthe noveleatures thereof in'claims.

and 1b, When placed endfto end With vshowing one* Vend to end With F ig.2"-r on both directions,

- by signals e ing toward the right is governed by signals Each of these signals,

'In the accompanying drawings', Figs. la

l2 onthclett, constitute a diagrammaticview Y i formv of' apparatus embodying and 2b, When placed the lett, constitute adiagrammatic view showing a modified form of apparatus also embodying my linf vention. y v

Similar reference characters, refer to similar parts in ,each Off the vievvs.

kReferring first erence character 29'designates a stretch of railway track over which tra-Hic movesin invention. Figs. '2a` the'usual insulated joints to form blocks 1'2, 2-3 and 3-l. These blocks are further di-` vided by insulated joints at points 5, 6 and 7, to ,form track sections '1 -5," 5-5-2, etc. Each track section is-providedY With the usual track circuit comprising aA track'battery. 30,

circuit which passes from the positive terminal of a battery K1 at location 1, through thek front-point of contact 8. of home relay H1, front contact 9 of track relay-TlE, front and a track relay designated'hy the reference character T With suitable vdistinguishing e2;- ponentsand subscripts. ,i Traiiic moving toward the left is governed S1, S2, S3 and S2', while trafiic mov- SlE, SEE, SSE and. a as here shown, is otv the light type, comprisingfthree electric `vlamps G, vY and R, which flamps when lighted, indicate Yproceed., cauvas thosel applied to 'the' signal.A

"tionlf andl ystop, showmeach signal islocated at the entrance endet one ofthe blocks,

provided with l respectively;l AsV Yhere so that each block is tWo signals governing traffic in "opposite directions therethrough. f

yAssociatedzvvith each signal S is a polarized home relay designated by the reference character H With the same exponent and subscript i is controlled in theusual manner by the asv sociate'd home-relay H. Referring particularly to signal S4, the circuit or-.theproc'eed polar 4contact y position, andlampfG to terminal O of the to Figs. .-12 and lb, the ref-7' which 'stretch' is divided rby home relay H2 "normal polarity, e the normal'direction, When relay -Each signal RAILWAY SIGNALING ArrAnAfrUs lampGot this signal is from terminal X,

of a suitable source of current, through the lfront pointof neutral Contact 27 of relay H4, 278 of this relay in the normal same source' ofi current. 'The circuit for the f caution lamp Y includes the front point of contact 27, and the polar Contact 28 in the reverse position.y The circuit for the stop lamp R includes the back pointerl neutral contact 27. It vollovvs that' the signal will indicate proceedy when relay H4 isenergized in the normaldirection, caution When this relayy is energized in the reverse direction, yand stop when the relay is deenergized.v The circuits 'fon the lamps of the remaining signals are 'v omitted from` the drawingto` simplify the disclosure, but itis understood thateach signal is controlled by its associated relay "H iin the same manner that signal S4r isr controlled by relay H4;

- Associated with the home relay H3 is a polarized slow-acting relay A2, and a normally open stick relay B3. Similar relays A and VB are provided for home relays VH2, H213 and Has. .The control of .these relays A and will be explained hereinafter.

(Home, relay H2 isprovided ywith a normal contact of track relay T2, Winding of relay H2, and common Wire O to the middle point of battery K1...` When kthis circuit is closed,` is supplied with current of 'so this relay is energizedin I H1 is open but the circuit' for relay H2 is closed at' the track relay contacts, this circuit Will pass from the negative relay contacts and the Winding ofv relay H2.

`Under this condition, current of reverse'pol terminal of batteryjKl, through theback point of Contact 8 of relay 'H2 and thence as before through'the track rvWinding' ofl relayA3 tothe middle pointv of front point of contact 11 of 'frontcontact 2l of relay B2,

lcircuit for' relay H3 'terminal of battery'K3, t l"cont-act 2O of relay kA3, front contact 19 of relay B3, and the back .A30

v its p ol-ar contacts .ferring to relay A3, theV normal circuit is from lgized, current 'of Ative'k terminal Vof 'battery Qing of relay A3 tothe middle Y -K3.' Thecircuits forlthe remainingrelays A VWill be understood from the foregoing Without detailed explanation.'`

relay H2, contact l2 oftrack relay T2E, back'contact 13 of re-v lay B2E, front contact 14C of track relay T3,

Winding of relay H3 and common Wire O to the middle point ofvvbattery K2. When this circuitis closed, current'ofY normal polarity is supplied torelay SH3. TWhen relay H2 is open andrelay B2 tery K2, through front contact 22 of relay A2, back point of contact ll of relay H2, contact`12 of track relay T2E, contact 13 of relay-B213, front contact la of track relay T3, Winding of relay H3,

and'coinmon Wire O 'to th'e'middle point of battery K2.v

are similar to those for relay H3." That is to say, the normal'ci'rcuit for relay H3 passes from the posi# tive terminal of battery K3 and includes the Vfront. point of contact' lgof relayl H3, conv ',tacts 16,- l7,and ljof relays T3E, B3@ and T4,

lWinding of relay H4 ,-25

and common `Wire 0 to the middle point of-battery K3.' 1 The reverse passes from the negative and includes 'front t kpoint of contact l5 of yrelay H3, the remainder of the Lcircuit vbeing .the same as the normal circuit for relay H3. The circuits for., the Ahome relays. HlE, Y H31@ and H4 will be understood from t Vi'oregoi'ng Without 'specific explanations.

'la'chVv auxiliary relay A is normally supplied With current are swung to the right. Re-

the'positiveterminal of battery K3, through front pointeof contact 23 of relay'H3, and the Each relay'A B is provided ivvith a pickup circuitand a stick circuit. Referring particularly to relay B3, the pick-'up circuit for ,thisy relay 1s from the negative terminal of battery K3, throughxback contact 36 of track Y relay T3,'polar contact 24 of relay A3 in the lnormal position, Winding of relay B3, and

' -common ivire-O to the middle point of battery It' will be seen that this circuit can be closed "when and only When track relay T3 is .open andthepolar contacts of relay in the normallposition. In other Words, it

` can be closed only during the interval between the'openin'g of track relay T3, and the response of the polar contacts of relay A3 to is closed, the circuit fork relay H3 is from the negative terminal of bat- A Under V-this condition current of reverse polarity rWill'be suppliedto relay H3. Y [The circuits forv relay H3:

`ing of track relay TlE ment, because this signal will, of course, be

of normal polarity, so that The opening of K3, through back the interval between the opening of Aand lthe responseof thepolar contacts of re- A3 arev the deenergization of relay'H3, and this interval Will occur -only When a train moving toward the left enters track section 6 3. The stick circuit for relay B3 is from the negative terminal of battery K3, through polar contact 26 of relay A3 inthe reverse position, contact 251of relay B3, and the Winding of this relay to the middle point of battery K3. The relay B3 is made sufficiently sloW acting to bridge the time interval' between the opening of polar contact 2A and the closing of polarcontact 26 of relay A3. '1 f The circuits for the remaining relays B arethe same as tliose'for relay B3, and will therefore be understood Without further explanation.` l

' Theoperation of the apparatus is as follows: Assuming that all parts of the apparatus are in the 'positions shown in the draW- ings, and that altrain moving toward the right enters sectionfl 5, the consequent open- Will open the circuit for homerelay H2 at contact 9, and the opening of relay H2 will openv at the front point of contactll the circuit for relay Similarly, the yopening of relay H3 Will'open at the front point of Contact l5 the circuit for relay H4. lt follows that relays H2H3 and H3 will all be opened, With the result that signals S2, S3 and 4 Will allindicate stop. Signal is not considered in the foregoing statecontrolled by apparatus to the left of point l. As ythe train moving toward the. right passes signal S2, this signal Will return 'to the proceed position, and the Same thing Will occur as the train passes signals S3'and S4.

l will now assume that a train moving to- Ward the left enters section 7 4. The opening of track relay T3 will open the circuit for relay H4, and alsov'the circuit for relay relay H3E will open relay H2E, and thisfwillresult inropening relay HIE. 'Tt follows that signal S3 and all of the signals, governing traifictoward the right will indicate stop. The opening of relayH3E Vwill causecnrrent. of reverse polarity to be supplied to .relay A3E, so that When the train enters section 3 7 and opens track relay T315, the pick-up circuit for relay B31@ Willy not 3 `be closed.

When 'the train' enters section 6 3, it will open track .relay T3, and this Will in turn open relayH3, so thatsignal S3 will indicate stop, Vand 'currentlof reverse ypolarity Will'be supplied toarelay A3.V During relay T3 lay 'A3, the pick-up circuit for r'elayB3 Will "be closed, and kWhe-n the pclarcontacts of relay A-3 respond,.the stick circuit for relay B3 .Willbecome closed` at contact v26. Thereverse circuit for relay H4 Will new be closed Vat contact 19 of V'relay B3, Contact 2O of relay A3 y Y lrelay H3, vso that relayfHtvvill become enerandthe back point,V of contact l5 of lli f i Y1,830,190

' being open. Vfhen 'thef.train ypasses signal S2. itV will cause.. thisv signalf'to indicate stop.

'It Willf also cause relay B? Ytolbecome' ener? y gized, thereby kcausing relay H? to become energized in the reverse direction', with. vthe result that signal Si?y Will change to the cau-- tiem indication. i The 'closinguof.*relay -H3 'will reverse the current supplied tol relay A3 so' that the stick circuit for, relay B3 will bes come opened. Theclosing of'relay H3 `Will alsofclose'the.,normalcircuitfr relay H4l so "that signal S4 will then change to thepro# ceed indication. As the trainfpasses signal' S1, vsignalS2 Willichange to thefcaution indiv cation and signalSatc the .proceed indication, andvvhenthe train leaves thepoint at {vvhich Vit influences rela-y SHI., the parts ofthe apparatus will be restored. to the conditions invwhichf they yare shown in .the drawings. r

The operation ofthe apparatus during the passager of a train moving toward thev right .out specific explanation.. .1

l will be understood froml the'foregoingwith lReferringnovv to Figs. 2@ and 2rb,the apparatus shown invthese views is thesameas" th'atsliown in Figs. l and 1b,'except=forthe V Vcircuits for certain of the home relaysf.` The circuit-,for relay .H2 in Fig. 2a is thesame as the *circuit forltheaz-same relay in Fig. l12 The circuitfonrelay H3 in Figs-12a and 2b, is, however, from the positivef terminalY of battery .through-polarY contacte() of .rey-lay 'A2 in the normal position, front. neutral contactel ofv relay A2, front Contact lQyof 'relay'T-Jbziclrcontact 13 ofrelay B2B, AfrontV Acontactli of relay Tia-.zand 'the' Winding of Y rel ay Hite ,thev middle point off battery K?. The-reverse circuit for relay H'is 4from the Cil negative terminal l of battery iK?, through front contact 21 ofrelayy B12, polarl contact 4-0 jo'fjrelay' A2 in Vthereverse position, front neutral 'conta'ct .lll of relay. A?, and then the saineV as before to the middle .point of' bat- ?tery K2; Itv will be seen, therefore, that `relayH will be supplied Withcurrent of 'nora mal.A polarity When Ithe track relays forblock are closed andrelay'AZ.isenergized in fthe normal direction`,lwhereas 'relay -H3 rWill' Y .be supplied With current of reverse polarity when-these track relays are energized,` and relay' A2 is energizedfin the I "ever'se direction, provided' th'atf stick `relay B? is closed. RelayV Htis controlledin r`f`rfsi1nilar manner by polar contact 42' and neutral- ContactV 43 of. relay A3. as Well astby frontcontactl 19 of stickrelay B31 The; circuits for relays Hlm and HZE Will 'ber understood from the "foregoing Without detailed' explanation.v f

.It isfbelieved that the operation ofy the apk'paratusfshovvn-in Figs. Qaand 2b will. be.

clear. from they foregoing explanation of the operationof the apparatus shown in Figs. laandl?. f f

f n The present application isa continuation -in partv of my copending application, Serial lNo.431,072,.filed February 25, 1930, for railway signaling apparatus. r

V:Although I( have herein shown and described only two forms of apparatus embody? ing my-inventio'n, it is understood that vari- -cous changes and modifications may be made therein Within they scope of the appended claims Without departing from the spirit and scopey of my. invention.

@Having thus described' my invention,

Ilclaim is: y 51.11.A In combination, a stretch of single track c divided `into blocks, track circuitsy including track relays for said blocks, a signal foreach d i lblock governing traic' in one vdirection throughsaid stretch, afhomerelay for the each home 'relay including frontI contacts of controlA ofeach signal, a normal circuit for 'the trackrelays fo'rtheA associated block and a front .contact ofjthevrhome relay for the 'block next in advanceas Well as a source of current of normal polarity, a'normally open stick relay for each block, an auxiliary sloW- acting polarized relay for each block, a circuit for eachauxiliaryjrelaysupplied with current of normal or reverse polarity according f'a-pick-u'p circuit for each stick relay including'fa normal polar contact'of the associated 'auxiliary relay andfa'back contact of the first4k tra'ckrelay for the associatedblock, a stick circuitI for each stick relay incuding a reverse polar contact of the associated auxiliary lrelay, andan-auxiliary circuit for ea'chhome -"relay including front 1contacts of the track.

Y relays for the associated block and a back Vcontact of the home relay forthe block next in y'advance as well 'as 'a front'contact of the stick yrelay"associated with theflatter home relay and a source of current of reverse polarity.

"2. In combination, a stretch of single track 'dividedinto'blocks,` track circuits including trackY relays'for said blocks, a'signal for each block; governing traffic in one f direction lcontrol of eachfsignal, a normallyropen stick relay and an 'auxiliary slow-acting polarized ,relay for each home relay, meansfor ener# Jgi'zing each auxiliaryrelayr in normal or reverse vdirection according as the associated yhome-relay isiclosed or open, means for ener-' gizing each'stick relay when the polar contacts ofthe associated auxiliary relay are in normal'position and the 'first track relay of #the associated v'section is open, meansffor as' the 'associatedhome relay is closed or open,

ythrough'said stretch, a home relay for the' lili) v.keeping each stick relay energizedvvhil'e the I Vpolar contacts of the associated auxiliary l y relay are in reverse position,and means operating when all'track relays of Va section are 0 closed toenergize the associated home relay in normaldirection if the home relayv for the section next-in advance is closed, and inV re-V verse direction when Vthe latter home relay is opened provided the 'stick relay'assoclated o.therewith is closed. Y i* v 3. In combination, alstietch of single track, signals governing traine through said stretch vin one direction,home relays for the control of saidsignals, means for controlling each 15'home relayby a1 front contact ofthe-home 'n zollayu is closed "and the associated home relay --is open to close an auxiliary circuit for theV fhom'e relay next inthe rear, an auxiliary slowrelay -next in advance, track circuits includ- .ing track relays for the control. of lsaid home relays, a normally open stick relay for each Y home relay, means operating When a stick re- Y. acting polarized relay. for eachk ,home relay, means for supplying 1 current of normal or 7 q5fr`everse ,polarity Ito'each auxiliary relayac- 'cording as the associatedfihome relay is closed or open, means for energizing each stick relay v:While the first trackrelay in advance is open andthe associated auxiliary relay polar con- 0 tacts are/normal, and r-means for keeping each l stick relay energizedaslong asthe auxiliary 'relay polar contacts vare reverse.

f f 4J In'fcomloination, astretch ofsingle track,

Ysignals"govern-ing,traffic through said stretch 9 in one direction, home relays `tor the control 1 of said signals,`a normally open stick relay 45 passes through said stretchin said one direc-y for each home relay,` a normal circuit for each home 'relayl including la front contact of the home relay next in advance, a reverse circuit foreach home `relay including aback contact of the. homeqrelay next advance land a front contact of the stick relayasso-v iciated With'the latter home relay, and means l for energizing said stickrelays When atrain tion but not in ythe other. f T

5. In combination, a stretch of single track,

:signals governing traiiic in one KVdirection :thro-ugh said stretch, home relays lfor the con- 50 trol of said signals, a normally. open stick ire-lay for each home relay, a normal circuit tor each 'home relay including a Yfront contact of tlie home relay next in advance and vlasonr'ce of current of normal polarity,a re- 5 verse circuit forl each home relay including `a hack Contact of the home relay next in ad'- vanceand a-frontr contact of the stick relay associatedwiththelatter.home relay as Well as asource of current oreverse polarity, and

50 means for energizing said stick relays When La' train passes .through said `stretch .one direction .but not inthe other;

6. In combination, a stretch of single track,

in f said f fsignals governing tralific through said stretch e5 lin onev direction home relays for the control of saidsignals, a .normally open stick relay for each home relay, a normal circuit for each `hoine relayv including "a front contact of the home relay next in advance,-a reverse circuit for each home relayincluding a back contact 'of the home relay next in advance and a front contact of vtheisticky relay. associated with the latter home relay,van auxiliary relay for each home relay," meansfforenergizing each auxiliary relay in normal or reverse direction according as the associated home'relay is closed or open,'means operatingL When a train movingin saidone direction passes each signal for energizing the'associated stick relay loeore'thev associated auxiliary. relay reverses,

each home'relay including a front contact of the home vrelay next in advance, a reverse circuit vfor eachhome relay' including Va back contact of the -homerelaynext in advance and a front contactV of the stick relay associated vvith the latter home relay,'track cirr'cuits for thefstretch for the control of said homel relays, and means for energizing each stick relay When a train passes the associated signal movi-ng in `said one direction but not in the other. Y f

8. In combination, astretch of single track divided` into blocks, trackv circuitsY including track relays for said blocks, a signal `for each .block @governing traffic; 2inY one direction through said stretch, a home relayyfor the lcontrol of each signal, a normally open stick f i relay and an auxiliary slovvsacting polarized relayfor each home relay, means'forfener'gizing each auxiliary relay in nornial or reverse directionv according as the .associatedv home relayis closed or open,'means for energizing .each stick relay When'the polar contacts of the associated auxiliary relay are in normal Tposition and thelirst trackrelay ofV the associated section is open, means' forl keeping each stick. irelay energized While the polar contacts of the associated'auxiliary relay are in reverse position,-and means for controlling each home relay by the track relays tor the associated section'and by the stickrelay and vauxiliary relay for `the section next in ad- 'vanceL 9. In combination, a stretchfof single track divided into blocks, track circuits including track relays for said blocks, a signal foreach .block governing traffic in one direction through' said stretch, a home relay for the control of each signal, a normally open stick relay and an auxiliary' slow-acting polarized relay for eachhome. relay,v means forenergizing each auxiliary relay in normal or'reverse Vdirection according asthe' associated home relay is'closed or open, means for energizing each stick; relay when the' polar contacts of v the associated auxiliary relayaare in normal position andy the first trackrelay of the as` sociated section` is open, means for keeping each stick relay energized while the polar contacts of the associated auxiliary relay arel in reverse position, and means operating when all trackirelays for a sectionv are closed to energize the associated'liome relay in normal direction if the auxiliary relay'for theV section nentin advance is energized in normal directionaand/ in reverse direction if'such aux# iliary .relay is energized Yin reverse direction *Y y provided the stick relay associated therewith is closed.

. In testimony-whereof I aixniy signature.

y Y v.TA-Mns H. BUTRIDGE. 

